PocketBook_MVVM/MVVM/Wrapper/LoanViewModel.cs

using Model;
using System.Collections.ObjectModel;
using ToolKit;
using static System.Reflection.Metadata.BlobBuilder;

namespace Wrapper
{
    public class LoanViewModel : BaseViewModel
    {
        IUserLibraryManager UserLibraryManager;

        WorkOnListBooks WorkOnListBooks { get; set; }

        //------------------------------------------------------------//

        public ObservableCollection<Book> LoansBook = new ObservableCollection<Book>();
        public ObservableCollection<GroupBooks> LoanGroupBooks { get; private set; } = new ObservableCollection<GroupBooks>();

        //------------------------------------------------------------//

        public LoanViewModel(IUserLibraryManager userLibraryManager,WorkOnListBooks workOnListBooks) 
        {
            this.UserLibraryManager = userLibraryManager;
            this.WorkOnListBooks = workOnListBooks;

            InitiateParam();
        }

        private void InitiateParam()
        {
            Index = 0;
            Count = 7;
        }

        private void LoadBooksLoan()
        {
            var result = UserLibraryManager.GetBooksFromCollection(index, count, "");
            if (result.Result.Item2.Count() == 0) { return; }
            Books.Clear();
            foreach (Book book in result.Result.Item2)
            {
                Books.Add(book);
            }

            List<GroupBooks> groupeBook = WorkOnListBooks.UpdateGroupBooks(Books.ToList());
            if (groupeBook.Count > 0)
            {
                GroupBooks.Clear();
                foreach (GroupBooks groupeBookUnique in groupeBook)
                {
                    GroupBooks.Add(groupeBookUnique);
                }
            }

        }


        public int Index
        {
            get { return index; }
            private set
            {
                setProperty(ref index, value);
            }

        }
        private int index;



        public int Count
        {
            get { return count; }
            private set
            {
                setProperty(ref count, value);
            }

        }
        private int count;
    }
}